MATLAB: How to set the distance in DOA algorithm

azimuth and elevation anglesconformal arraysdirection of arrivalmvdrestimator 2dPhased Array System Toolboxsound localization

Hello everyone, I am trying to localize narrowband signals with microphone Arrays using DOA algorithm. As you know in this algorithm we have to enter the position of the incoming source with Azimuth and Elevation angles, but we dont consider the distance between the microphone Array and the source. I want to know that how it is possible to set this distance. Thanking you.

Best Answer

Could you elaborate which algorithm you are trying to use? The assumption for DOA algorithms in Phased Array System Toolbox is that the incoming signal is a plane wave. Therefore that distance doesn't matter. If you need that distance, maybe you are dealing with a spherical wavefront?

HTH

Related Solutions

MATLAB: How to convert spherical coordinate to cartesian in DoA algorithm

Not sure what you mean by "too many azimuth and elevation values". According to your settings, you should only get one set of azimuth/elevation values back.

This being said, in general, it would be difficult to translate the angle to a point in Cartesian coordinate based on your approach because all these DOA algorithm assume that the signal is from far field. Thus, only the direction matters, not the distance. So in some sense, you can think that you have azimuth and elevation angles in your spherical coordinates, but not the r component. But if you have the knowledge of r, then you can use sph2cart to do the translation.

HTH

MATLAB: Is there a way to extract numerical information on the antenna directivity as opposed to just visualizing it using the pattern command

Yes, if you want the entire pattern, you can just specify an output, like

[D,az,el] = pattern(array,fc,az,el,'Type','directivity');

On the other hand, if you just want to compute directivity values for certain directions, you can consider using directivity() method, as

D = directivity(array,fc,[az;el])

HTH

Best Answer

Related Solutions

MATLAB: How to convert spherical coordinate to cartesian in DoA algorithm

MATLAB: Is there a way to extract numerical information on the antenna directivity as opposed to just visualizing it using the pattern command

Related Question